> It's apparently got [... ] 256 megs of RAM. [... ] MorphOS would run just fine on
> this or the 5121e. They both have double the RAM of Efika.

I think you're once again mixing up boards with CPUs. The amount of RAM in a device with either CPU solely depends on the design of the board. The CPUs themselves neither have any real RAM (except some small caches) nor dictate the exact amount of RAM to be installed on the board. For instance, there are MPC5121e based devices with double the RAM of Efika 5200B (e.g. LimePC-X1/uBox/C114, LimeBook/uBook) and MPC5121e based devices with quadruple the RAM of Efika 5200B (e.g. C120, ADS512101/"Hellrosa", G-MPC5121 Bali). Likewise, there are MPC5125 based devices with same amount of RAM like Efika 5200B (e.g. MPC5125SOM) and MPC5125 based devices with double the RAM of Efika 5200B (e.g. TWR-MPC5125). And finally, there are MPC5200B based devices with double the RAM of Efika 5200B (e.g. EM1A, EM1N, EK6N, F12N).